Dear support team,
Our customer is studying ADS7828-Q1 now.
I have gotten some questions regarding ADS7828-Q1 from the customer.
The customer want to use this device beyond the recommended temperature range (up to Ta=105°C),
because the customer’s product must be guaranteed up to Ta = 85°C.
This device is cased in the product, and Ta in the casing of the product is estimated about 105°C
(considering the worst condition that is no convection in the casing of the product).
According to the specifications of ADS7828-Q1,
Power consumption: 1 mW (max)
Thermal resistance: 108.4°C / W
Tjmax: 150°C
So, it seems to be no problem with respect to thermal properties.
But why is absolute maximum rating of Ta -40~85°C?
I guess that there is some reason like accuracy cannot be maintained.
The customer also thinks so, and wants to know what characteristics deteriorate.
The customer tries to design in consideration of the concerned characteristics.
Are there somethings data regarding Ta > 85°C? (e.g. Ta=105°C)
Based on its contents, we would like to negotiate with the customer.
Please help and advise me!
Best regards,
M. Tachibana